I've decided to make this entry separate so the crossover looks more unique. =~_^= Ever since Namco X Capcom came out for Japan only (deep sigh) I wanted to see Klonoa make a comeback. Especially the fact of Project X Zone one and two being out. Only to discover that it was an anime/human only crossover with the same RTS(?) gameplay. Not only that, but these three characters are the ones I respect the most of all three series.
Tails has always been the cute, smart and strong backbone to the series. Sonic may be cool with the attitude but with out him, the hedgehog might as well be done for in some cases.
Klonoa has always been the lovable Dream Traveler that saves dream worlds, reveals the good in everyone and tugs at your heartstrings while doing so. It was awesome to see him grow in character while developing in new abilities and weapons while still retaining who he is.
And Milla is THE STRONGEST CHARACTER of them all. For a young pup who discovers two new friends that she wants to help. Only to be caught by a ruthless tyrant who "forced" her to transform into a monster which her trusted friends had no choice but to fight her within an inch of her life to return to normal and NOT get traumatized while still being her bubbly self. The only three characters I can think that are close to being that strong are Cream, Tangle and Whisper. Sorry for getting deep into that, but man, Milla gets the utmost respect from me.